OAKLAND -- A 24-year old Marine Corps corporal and Iraqi war veteran remained in critical condition at Highland Hospital on Wednesday night with head wounds and brain swelling after being injured in Tuesday's Occupy Wall Street confrontation.

Friends say he was hit in the head with a police projectile during the downtown Oakland late Tuesday night.

Scott Thomas Olsen, 24, of Onalaska, Wisc., was admitted to Highland after he was hit on the head above his right eye during clashes with police, said hospital spokesman Curt Olsen.